Showing an image on the back of the shirt. Not always a shell, but there will be a design on the back.

Pullover Sweatshirts
Done on an indigo Gildan brand pullover sweatshirt, this fabric has shells, starfish, and words such as relax or sand or beach. Please indicate your choice if you want the bottom elastic band of the sweatshirt on or off.
If you prefer to have a different color shirt, please make a note in the instructions box.Reference: 42836